Express revocation or termination.

Sections 29A.74 and 29A.75 of this chapter shall not operate to alter, invalidate, or in any manner affect any express provision for revocation or termination contained in any power of attorney. [C46, 50, §29.72; C54, 58, 62, §29.94; C66, 71, 73, 75, 77, 79, 81, §29A.76 ]